If your cat has feline herpes, Vetoquinol Enisyl-F Supplemental Paste can help reduce flare up severity and duration, and also has a tasty flavor your cat will enjoy! The active ingredient in these nutritional supplements, L-Lysine, has been proven to help manage your cat’s viral infection so he or she can live an active life! Paste can be applied directly into the mouth, or on the nose/paw where it can be licked off. Alternatively, it can be applied to your cats food if more convenient. Each press of the pump dispenses 1 mL of paste.